Part 6 Service Diagnosis - Daikin FTXG-J Service Manual

SiBE041012_B
1. Troubleshooting with LED .....................................................................63
2. Problem Symptoms and Measures .......................................................64
3. Service Check Function ........................................................................65
4. Troubleshooting ....................................................................................68
5. Check ..................................................................................................110
Service Diagnosis
Service Diagnosis
1.1 Indoor Unit..............................................................................................63
1.2 Outdoor Unit ...........................................................................................63
4.1 Error Codes and Description ..................................................................68
4.2 Indoor Unit PCB Abnormality .................................................................69
4.3 Freeze-up Protection Control or Heating Peak-cut Control....................70
4.4 Fan Motor (DC Motor) or Related Abnormality.......................................71
4.5 Thermistor or Related Abnormality (Indoor Unit)....................................73
4.6 Front Panel Open / Close Fault..............................................................74
4.7 Refrigerant Shortage ..............................................................................75
4.8 Low-voltage Detection or Over-voltage Detection..................................78
4.9 Signal Transmission Error (between Indoor Unit and Outdoor Unit) ......80
4.10 Signal Transmission Error on Outdoor Unit PCB
(RXG50K2V1B Only)..............................................................................82
4.11 Unspecified Voltage (between Indoor Unit and Outdoor Unit) ...............83
4.12 Outdoor Unit PCB Abnormality...............................................................84
4.13 OL Activation (Compressor Overload) ...................................................86
4.14 Compressor Lock ...................................................................................88
4.15 DC Fan Lock ..........................................................................................89
4.16 Input Overcurrent Detection ...................................................................90
4.17 Four Way Valve Abnormality..................................................................91
4.18 Discharge Pipe Temperature Control.....................................................93
4.19 High Pressure Control in Cooling ...........................................................94
4.20 Compressor System Sensor Abnormality ..............................................95
4.21 Position Sensor Abnormality ..................................................................97
4.22 DC Voltage / Current Sensor Abnormality (25/35 Class Only).............100
4.23 CT or Related Abnormality (RXG50K2V1B Only) ................................101
4.24 Thermistor or Related Abnormality (Outdoor Unit)...............................103
4.25 Electrical Box Temperature Rise..........................................................105
4.26 Radiation Fin Temperature Rise ..........................................................106
4.27 Output Overcurrent Detection ..............................................................108
5.1 Thermistor Resistance Check ..............................................................110
5.2 Fan Motor Connector Output Check ....................................................111
5.3 Power Supply Waveforms Check.........................................................111
5.4 Outdoor Electronic Expansion Valve Check.........................................112
5.5 Four Way Valve Performance Check ...................................................113
5.6 Inverter Units Refrigerant System Check .............................................113
5.7 Inverter Analyzer Check .......................................................................114
5.8 Rotation Pulse Check on the Outdoor Unit PCB ..................................116
5.9 Installation Condition Check.................................................................117
5.10 Discharge Pressure Check...................................................................117
Part 6
61